After getting frustrated with In Vitro Fertilization Dr. Banfield and her husband decide to try an adoption agency to fulfill their dreams of having a family. Dr. Carter quickly tries to jump back into working at County but struggles with all the new procedures and technology. Sam is shocked when her mom comes into the ER in an altered state of mind

Trying to get pregnant through IVF proves frustrating and fruitless, so
the Banfields explore their options with an adoption agency. Dr. Carter is
overwhelmed by the procedural and technological advances to
emergency medicine that have been implemented since he's been gone.
Sam gets quite the shock when her mother comes into the ER. Banfield
discovers Carter's secret.